Panduit FHCXN-12-03AS 12-Fiber OM3 MPO-SC Cassette

Panduit FHCXN-12-03AS HD Flex Fiber Cassette

The Panduit FHCXN-12-03AS delivers high-density fiber breakout for 40G and 100G datacenter deployments. This HD Flex cassette houses 12 OM3 multimode fibers in a single-wide module, converting one MPO-12 trunk connection to six duplex SC ports with Method A polarity. Pre-terminated at the factory and field-swappable in seconds, it eliminates on-site fusion splicing, reduces deployment errors, and maintains consistent insertion loss across all channels—critical for enterprise backbone-to-horizontal distribution and 40GBASE-SR4 breakout applications.

Key Features

• MPO-12 to 6× Duplex SC Breakout — One 12-fiber trunk connection fans out to six duplex SC ports for structured horizontal cabling
• OM3 50μm Multimode Fiber — Supports 10GBASE-SR to 300m and 40GBASE-SR4 to 100m per TIA-568.3-D standards
• Method A Polarity (Straight-Through) — Industry-standard pin mapping simplifies migration from duplex to parallel optics
• HD Flex Single-Wide Form Factor — Fits standard 1U Panduit enclosures; 12 cassettes per panel = 144 fibers in 1U
• Factory Pre-Terminated — Guaranteed insertion loss ≤0.35 dB and return loss ≥-20 dB; zero field splicing required
• Black Polycarbonate Housing — UL 94 V-0 flame-rated material with integrated dust shutters on SC adapters
• Industrial Temperature Range — Operates -40°C to +75°C for both controlled datacenter and telecom hut environments

The HD Flex architecture addresses the core challenge of modern datacenter fiber distribution: bridging 12-fiber and 24-fiber MPO trunk cables to traditional duplex SC patch cords without sacrificing density or performance. Each FHCXN-12-03AS cassette terminates a single 12-fiber MPO connector (male, key-up) on the rear and presents six duplex SC adapters (ceramic-sleeved, zirconia ferrules) on the front. Internal ribbon fiber maintains the OM3 specification—50μm core, 500 MHz·km modal bandwidth at 850nm—supporting 10 Gigabit Ethernet to 300 meters and 40 Gigabit Ethernet (using all 12 fibers as a single 40GBASE-SR4 link) to 100 meters. Method A polarity follows the TIA-568 straight-through convention: transmit fibers on positions 1-6 of the MPO map directly to the first three SC duplex pairs, positions 7-12 map to the remaining three pairs. This one-to-one mapping eliminates the need for crossover patch cords when connecting to duplex transceivers, simplifying inventory and reducing deployment errors. The cassette's internal fanout maintains controlled bend radii—no radius tighter than 7.5mm per industry best practices—and each fiber is individually color-coded per TIA-598 (aqua jackets for OM3) for visual traceability during troubleshooting. Insertion loss is factory-tested on every mated pair and guaranteed to remain ≤0.35 dB, while return loss exceeds -20 dB across all channels, ensuring margin for multi-hop datacenter fabrics and long horizontal runs.

In deployment, the FHCXN-12-03AS fits Panduit's standard fiber enclosures (FAP1U, FHEL series) and third-party 1U 19-inch panels accepting single-wide modules. Installation takes under 30 seconds: slide the cassette into an open slot, snap the retaining latch, and route the MPO trunk to your backbone switch or patch panel. The front SC ports are immediately ready for duplex SC patch cords to servers, switches, or horizontal fiber runs. This pre-terminated approach cuts installation time by 80% compared to field-terminated breakout cables and guarantees performance—every cassette ships serialized with test data documenting insertion loss, return loss, and fiber length for each channel. The polycarbonate housing includes integrated dust shutters on unused SC ports, preventing endface contamination in partially populated panels—a critical feature in phased datacenter builds where enclosures may sit partially filled for months. The rear MPO connector is recessed to protect the ferrule endface during handling and transportation, and the cassette includes a pull-tab for tool-free removal during maintenance or reconfiguration.

Because the cassette is a passive optical component with no active electronics, it requires no power, generates no heat, and imposes no additional latency on the optical path. This makes it suitable for both climate-controlled enterprise datacenters and uncontrolled outdoor telecom cabinets—the -40°C to +75°C operating range covers the full spectrum of commercial installation environments. Field serviceability is a key advantage in mission-critical networks: if a single fiber fails due to physical damage or connector wear, you swap the entire cassette in seconds without disturbing adjacent modules, re-certifying the trunk cabling, or scheduling a fusion-splicing technician. The modular design also supports incremental capacity expansion—start with six cassettes (72 fibers) in a 1U panel and add modules as port demand grows, avoiding the stranded-investment problem of oversized breakout cables. The HD Flex form factor is backwards-compatible with Panduit's earlier cassette generations, allowing mixed deployments during technology transitions, and forward-compatible with 100GBASE-SR4 architectures (which use two 12-fiber cassettes per 24-fiber trunk), giving you a migration path from 10G to 100G without replacing your fiber enclosure infrastructure.

The FHCXN-12-03AS complies with TIA-568.3-D for OM3 multimode fiber performance and geometry, IEC 61754-7 for MPO multi-fiber connector mechanical interface, and IEC 61754-4 for SC connector optical and mechanical requirements. The polycarbonate housing meets UL 94 V-0 flammability rating, satisfying NEC Article 770 requirements for in-rack installation without additional cable management enclosures. Method A polarity is the de facto standard for 40G deployments—it matches the pin-out used by Cisco QSFP-40G-SR4, Juniper EX4600 QSFP+ optics, and Arista 7050 series 40G transceivers, allowing direct trunk-to-transceiver connections without Type-B adapter modules or polarity-flipping patch cords. This polarity consistency extends across Panduit's entire HD Flex ecosystem, meaning your method-A trunk cables, cassettes, and patch panels interoperate without requiring field technicians to track multiple polarity schemes or maintain separate patch cord inventories. For integrators building multi-vendor datacenter fabrics, the FHCXN-12-03AS provides the standards-compliant physical layer that ensures optical budgets close correctly regardless of switch vendor, transceiver brand, or trunk cable supplier.